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Albert Einstein Published in S. T. Joshi ed., Icons of Unbelief, Westport, CT: Greewood Press, 2008 Albert Einstein BIOGRAPHICAL OVERVIEW Albert Einstein, the most influential physicist of twentieth century and “Person of the Century” according to Time magazine, was born on 14 March, 1879, in Ulm, a city in the South of Germany. His parents, Hermann Einstein and Pauline Koch, were not observant Jews. In the year following his birth, Einstein’s family moved to Munich, where the young Albert attended the public elementary school and the Luitpold Gymnasium. In 1894 his parents moved to Italy in Milan and Pavia with their daughter, Maja (born in 1881), while Albert stayed in Munich to continue his studies. He was so upset by the loneliness that in the following year, he abandoned the gymnasium without graduating to rejoin the family. After a failing to be admitted to the Eidgenössiche Technische Hochschule (ETH; Federal Institute of Technology) in Zürich, he finished secondary school in Aarau in 1896. On his second attempt at admission, Einstein entered the ETH and graduated in 1900. The following year he became Swiss citizen (he had renounced German citizenship in 1896 and for five years had been stateless). The year 1902 was a critical one for Einstein: In January he had a child with Mileva Marić (they married in 1903); in June he began working at the Federal Office for Intellectual Property in Bern, having failed to gain a professorship in ETH; in October his father died in bankrupt in Milan. The work at the Federal Office for Intellectual Property did not engage him fully, and during his spare time Einstein wrote several papers on theoretical physics, which he submitted to the renowned journal Annalen der Physik. The five papers contributed in 1905 are so important in the history of physics that 1905 is called Einstein’s annus mirabilis (miracle year). These articles dealt with the determination of molecular dimensions, Brownian motion, the hypothesis of light quanta, the special theory of relativity, and the energy-mass equivalence. Only in 1908 did the academic establishment begin to recognize Einstein’s scientific competence. In that year he was appointed Privatdozent at the University of Bern; in 1909, associate professor at the University of Zurich; in 1911, full professor at the University of Prague; in 1912, professor at the ETH. After his return in Germany in 1914, he taught at the University of Berlin. In 1919 he became world-famous because his prediction of the blending of light in a gravitational field—a consequence of the general theory of relativity—was confirmed by observation of the apparent position of stars during a solar eclipse. In that year Einstein divorced Mileva Marić (they had three children) and married his cousin Elsa Löwenthal. In 1922 Einstein was awarded the Nobel Prize “for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect”. Einstein’s Nobel lecture was dedicated to relativity theory, although the Nobel Prize did not mention relativity theory, only his discoveries in quantum physics. In 1933, when Hitler became chancellor of Germany, Einstein was a visiting professor in the United States; he did not return to Germany and, after a brief stay in Belgium and England, accepted a professorship at the Institute for Advanced Study in Princeton, New Jersey, where he remained until his death. In 1940 he became an American citizen (he also preserved the Swiss citizenship). In 1952 he declined the offering of the Presidency of the State of Israel. Einstein died on 17 April, 1955, of an aortic aneurysm. SCIENTIFIC CONTRIBUTIONS The list of Einstein’s scientific contributions is astonishing. The theory of relativity has utterly changed our conception of space and time, not only from a scientific point of view, but also from a philosophical viewpoint. Among the many consequences of relativity theory are energy-mass equivalence, the retardation of moving clocks, the deflection of light by gravity, the explanation of the anomalous precession of the perihelion of Mercury, and the effect of gravitational lens. Einstein utilized the equations for the gravitational field to build a model of a finite but unlimited static universe characterized by the repulsive force that finds expression in the so-called cosmological constant and thus initiated the field of contemporary cosmology. He contributed greatly to the development of quantum physics, working on the determination of molecular dimensions, Brownian motion, the photoelectric effect, the stimulated emission of light, the wave-particle duality of light, and the Bose-Einstein statistics. Einstein’s notoriety moved many people to attack relativity theory, which become the preferred target of several philosophers, amateurs, and professional scientists. The attacks intensified with the advent of Nazism, when the German physicists affiliated to the Deutsche Physik movement denied the validity of relativity theory. Einstein is attacked even today, though for different reasons: Accusations of plagiarism are not unusual, and his theories are ascribed to other persons, such as Henri Poincaré, Hendrik Lorentz, David Hilbert, and Einstein’s first wife, Mileva Marić. The source of many of these attacks is personal aversion, to which sometimes is added a prejudice against Einstein’s Jewish origins. Einstein fought a long, solitary battle against the most common interpretation of quantum mechanics, which regards the goal of describing the world of microphysics by means of exact causal laws as an impossible task. Einstein was a firm supporter of the necessity of employing deterministic laws in every field of physics. In his opinion, the probabilistic nature of the quantum mechanical description of microphysics was due to the inherent incompleteness of quantum mechanics. He designated a thought experiment, now called EPR (from Einstein, Podolsky, and Rosen, the three authors of the paper in which it is described), to prove this incompleteness. Years later EPR has become one the most dramatic examples of the deep complexity of quantum theories and can be regarded as the first proof of the nonlocal character of quantum mechanics. SCIENCE AND RELIGION Einstein’s thoughts about religion and its relationship with science are expressed in several short papers, written for different occasions and partially collected in Out of My Later Years and in Mein Weltbild (an English translation, with addenda and revisions, was divided into two books, The World As I See It and Ideas and Opinions). Especially interesting are the three papers “Religion and Science”, published in The New York Times in 1930; “Science and Religion”, which consists of two parts, the first one being the text of a discourse that Einstein gave at Princeton Theological Seminary in 1939, and the second being a contribution to a symposium about science, philosophy and religion in 1941; and “Religion and Science: Irreconcilable?” published in The Christian Register in 1948. In these papers, whose main subject is the relationship between science and religion, Einstein denied the existence of an insurmountable antagonism between science and religion and claimed that their conflict is more apparent than substantial. Another interesting source is the 1931 article “The World As I See It”, in which Einstein stated his disbelief in a personal God and the immortality of soul and explained that he could be considered “a deeply religious man” (Ideas and Opinions, 12) only because true religiosity is “the knowledge of the existence of something we cannot penetrate” (11–12) and is the emotion raising from the experience of mystery, an emotion that “stands at the cradle of true art and true science” (11). According to this particular sense of the term religious, doing science is a deeply religious activity. Hence we can understand why Einstein said that “serious scientific workers are the only profoundly religious people” (43) and why, in the short 1934 paper “The Religious Spirit of Science”, he wrote that the religious feeling of scientists derives from the “amazement at the harmony of natural law” (43), which reveals a superior intelligence. This intelligence, however, acts only by means of strictly deterministic causal laws, which prohibit the interference of supernatural forces. There is no room for God’s miracles, and thus there is no room for a personal God, who punishes and rewards his creatures; moreover, there is no use for a class of priests acting as intermediaries between God and people. What is the method of science? The letter that Einstein wrote to Maurice Solovine on 7 May, 1952, contains the best description, in my opinion, of Einstein’s conception of scientific method. In this letter, in four concise and clear paragraphs, Einstein explains the interaction between experience and theory. First, there are the experiences. Second, there are the axioms of the scientific theory; there is no logical law that permits one to deduce the axioms from the experiences—at most, there is a psychological connection. Third, from the axioms we can deduce particular statements. Fourth, we control these particular statements by confronting them with the experiences. The most important point is that there is no logical connection between the experiences and the concepts occurring in the axioms and in the particular statements. Einstein had already expressed this conception in a 1936 paper about physics and reality (“Physik und Realität”, reprinted in Out of My Later Years and in Ideas and Opinions), where he said that the concepts are not identical with the totality of sense impressions, but are arbitrary creations of the human mind, logically independent from sense experiences. The justification of a scientific theory resides only in the success of the results: there is no inductive justification, because the theory does not logically derive from the experiences. “I cannot conceive of a God who rewards and punishes his creatures, or has a will of the kind that we experience in ourselves.
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